3. UNIT SPECIFICATION
Item B: Automatic control unit
The automatic control unit contains the basic functions of a 2-posilion controller with PD/PID
control response, time switch to switch the heating and ventilation on / off after the set time, the
added features of permanently programmed heating process programs and the programmed
controller functions of a freely programmable process controller.
Fig. 3/3: Control unit control panel
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"C
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IB
*vl
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D P
Q Q
i
A
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M
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Signal lamp - healing &talus
Signal lamp - control uml status
Display panel
Control key
"Increase displayed value" key
"Reduce displayed value" key
"Programming function" key
"Air speed adjustment" key
Display panel
The status of the control unit is Indicated by signal lamps in the display panel.
THE YELLOW SIGNAL LAMP (Item 1) indicates the current status of the heating control sy-
stem:
unit heating activated
heating off
»• Lamp switched on •
•• Lamp switched off
:
Rhythmic flashing of this signal lamp indicates that the temperature controller is regulating
the operating temperature.
• THE GREEN SIGNAL LAMP (Item 2) indicates the status of the control unit:
> Lamp on » control unit switched on: heating and blower enabled.
The heating and blower are activated when the unit is switched on (On / Off switch).
•• Lamp off » control unit switched off: heating and blower disabled.
The heating and blower are not activated when the unit is switched on
*• Lamp flashes * time-switch function activated.
Basic functions
The control unit is equipped with the "temperature control", "time switch" and "inside air
speed adjustment" basic functions.
The unit can set an operating temperature of up to 250 *C, switching times of between
0:01 and 99:00 hours and and Inside air speed in stages of approx. 40 %, approx. 70 % and
100%.
Refer to STARTING UP WITH BASIC FUNCTIONS for information about the commands for
the basic functions.
12/34 50 042 750 Issue: May, 1994
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